Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/02—Pile fabrics or articles having similar surface features
  • D04B1/04—Pile fabrics or articles having similar surface features characterised by thread material
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
  • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D27/00—Woven pile fabrics
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/02—Pile fabrics or articles having similar surface features
  • D04B1/025—Pile fabrics or articles having similar surface features incorporating loose fibres, e.g. high-pile fabrics or artificial fur
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/02—Pile fabrics or articles having similar surface features
  • D04B21/04—Pile fabrics or articles having similar surface features characterised by thread material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/23907—Pile or nap type surface or component
  • Y10T428/23957—Particular shape or structure of pile
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2933—Coated or with bond, impregnation or core
  • Y10T428/2964—Artificial fiber or filament
  • Y10T428/2967—Synthetic resin or polymer

Definitions

• the present invention relates to a highly shrinkable acrylic fiber suitable for a raised fabric such as a bore or a high pile fabric, a pile composition containing the highly shrinkable acryl-based fiber, and a fluffed fabric using the pile composition.
• Acrylic fibers have animal-hair-like texture and gloss, and are widely used as pile materials for animal-hair-like napkins such as bores and high pile fabrics.
• a high pile cloth which is a pile fabric, usually has a two-layer structure in which the pile portion is composed of stab (guard hair) and downy hair (down hair).
• this sliver After mixing with raw cotton for hair to form a sliver, this sliver is knitted together with the ground yarn as the base fabric into a knitted fabric to form a pinore part on the surface, and then processed with resin on the back side and called a tenter At the same time as curing with a heat treatment device, only the fibers for hair growth in the pile part are shrunk, and in the polishing step, the fibers for non-shrinkage hairs in the pile part are stretched by removing their crimps. Therefore, high shrinkable acrylic fibers are suitable for raw cotton for hair growth, and acrylic fibers that exhibit high shrinkage by dry heat are required because the tenter is a dry heat type.
• Patent Document 2 Japanese Patent Application Laid-Open No. H11-191914. No.
• shrinkable stable fibers having a shrinkage of 15% or more and 1 to 3 secondary crimps / inch regardless of dry heat or wet heat have been proposed (for example, Patent Document 3: Japanese Patent Application Laid-Open No. (See Japanese Patent Application Publication No. 316705).
• the process of applying heat is not only a treatment process in a tenter but also a polishing process, and the temperature in the polishing process is usually set higher than the temperature of the tenter. I have. Therefore, in the case of the conventional highly shrinkable acryl fiber as described above, shrinkage is more likely to occur in this polishing step than necessary, and as a result, a product of satisfactory quality in terms of softness and volume is obtained. It is difficult.
• the processing size of the high pile cloth, the processing speed, the processing temperature of the tenter often differ depending on the type of tenter, and the product standards of the high pile cloth that meet the various demands of the market exist.
• the raw cotton for pilging gives the high pile fabric an animal hair appearance and texture by removing the crimp of the fiber to be raised in the above-mentioned polishing step.
• the cotton wool is a fiber that can be easily crimped in the polishing step.
• the dyeing step is generally performed after crimping is applied.
• a method of increasing the number of times of polishing in the polishing step or increasing the polishing temperature is generally used. Addition of heat or an increase in temperature leads to the removal of crimps of hair-grown fibers that do not require crimp removal, and it is easy to produce a product without volume and luxury.
• Patent Document 1 Japanese Patent Application Laid-Open No. 60-110109
• Patent Document 3 JP-A-9-131650
• the present inventors have proposed a heat-shrinkage property against dry heat of a pile-forming raw cotton used for a napping cloth, particularly a fiber used as a hair-growing component thereof, and a napping cloth using the fiber in a pile composition.
• the present invention has been achieved.
• An object of the present invention is to suppress variations in shrinkage of fibers that become hair growth in a treatment process using a tenter when manufacturing a napping fabric, to suppress crimp removal of the hair growth fibers in a polishing process, and to soften a variety of napping fabrics.
• the present invention comprises an acrylonitrile-based polymer containing 50% by weight or more of attril-unit ethril units, and has a shrinkage rate of 25 to 35% after no-load treatment at 130 ° C. for 10 minutes at dry heat. And the difference between the maximum value and the minimum value of the shrinkage after treatment for 10 minutes under no load in the range of 120 to 140 ° C is within 8%.
• High shrinkable acrylic fiber The present invention also relates to a pile composition containing the high-shrinkable acryl-based fiber in an amount of 20 to 90% by weight. Further, the present invention relates to a napped fabric using the pile composition.
• the high-shrinkable acrylic fiber in the present invention is a fiber made of an acrylonitrile-based polymer containing 50% by weight or more of an acrylonitrile unit, and is subjected to dry heat under no load at 130 ° C. for 10 minutes. Has heat shrinkage properties with shrinkage of 25-35% .
• This highly shrinkable acrylic fiber has an important effect on the bulkiness and texture of a piled up fabric having a pile such as a two-layered pile composed of stabbed hair and hair growth, and a jacquard pile, and also has an important effect on the appearance of the piled up fabric. It is useful as a hair growth component to be given.
• the highly shrinkable acryl-based fiber of the present invention has a difference between the maximum value and the minimum value of the shrinkage ratio after a treatment for 10 minutes under a dry heat of 120 to 140 ° C under no load for 10 minutes. It has a heat shrinkage property of less than 6%, preferably less than 6%, more preferably less than 3%.
• a nappied fabric is used as a hair-growing component
• a high-shrinkable acrylic fiber serving as a hair-growing fabric is contracted by a tenter to shrink the fibers.
• the highly shrinkable acrylic fiber of the present invention has a fiber-to-fiber static friction coefficient ⁇ s of 0.40 or less, a fiber-fiber dynamic friction coefficient d of 0.30 or less, and a static friction coefficient thereof. It is preferable that the difference ⁇ ( ⁇ s ⁇ ⁇ ud) between us and the dynamic friction coefficient d is in the range of 0.01 to 0.2.
• the fiber-to-fiber static friction coefficient as is 0.40 or less and the fiber-to-fiber kinetic friction coefficient d is 0.30 or less
• the highly shrinkable acrylic fiber of the present invention is used as a hair-growing component to raise hair.
• the entanglement of the fibers after shrinking is reduced, and further, the problem that the hair growth fibers are crimped together with the hair growth fibers in the polishing step can be avoided, so that the hair growth layer and the hair growth layer are used.
• the layers are clearly formed.
• the texture of the pile of the napping cloth is also flexible, and a high-quality napping cloth can be obtained.
• Means for controlling the volume ⁇ in the range of 0.01 to 0.2 include a method of controlling the cross-sectional shape of the fiber, the surface morphology of the fiber, a type of the oil agent, and a method of appropriately selecting and combining the amount of the oil agent. Method is used. It is generally preferable to use a leveling agent for the oil agent, and examples of the leveling agent include polyorganosiloxanes, higher alcohol esters, glycerin esters, and cationic surfactants.
• the crimp number ⁇ (ke / inch) of the single fiber is preferably 5 to 12, more preferably 6 to 10.
• the degree of crimp D (%) is preferably 7 or more, more preferably 9 or more. If the degree of crimp is too large, the fiber-opening property between the fibers decreases, and a lump of fibers such as a nep is likely to be formed.
• the value of the product N X D is preferably 50 or more, and more preferably 70 or more. Further, in order to prevent the generation of a lump of fibers, it is preferably 200 or less.
• the hair-growing fiber used for forming a two-layered pile is usually a cotton-like short fiber having a fiber length of 32 mm or less. It is often used as a body, but in the case of short fibers such as this, in general, when slivers are made from short fibers, quality degradation due to poor conjugation of the fibers and productivity reduction due to yarn breakage are unavoidable. More likely to occur.
• the highly shrinkable acrylic fiber of the present invention has a sufficient sliver conjugation property even when the fiber length is short. Can be easily created.
• the larger the number of crimps N the higher the value of the degree of crimp D is preferable, but the number of crimps When the N is small, the crimping degree D is high.
• the crimping degree D is low, it is preferable to set the number of crimps N large in order to create a slipper.
• the acrylonitrile-based polymer constituting the highly shrinkable acrylic fiber of the present invention is obtained by polymerizing acrylonitrile and a monomer copolymerizable with acrylonitrile. It is.
• the content of acrylonitrile units in the polymer is preferably at least 80%, particularly preferably at least 85%, and usually at most 99%.
• the monomer copolymerizable with Atari-mouth-tolyl is a monomer having a copolymerizable double bond (also referred to as a butyl monomer in the present specification), for example, atarilic acid, methacrylic acid, or an alkyl ester thereof. Butyl acetate And vinyl chloride and vinylidene chloride.
• vinyl acetate, vinyl chloride, and methyl acrylate are preferably used in terms of quality and cost.
• a sulfonic acid group-containing monomer is used, it is preferably used in combination with another vinyl monomer in an amount not exceeding 0.5% by weight.
• These butyl monomers may be used alone or in combination of two or more.
• the glass transition temperature T g is less than 90 ° C.
• the hair-grown fiber after heat-shrinking with a tenter is polisher. In the process, the hair is easily stretched, and the pile appearance and texture tend to deteriorate.
• the acryl mouth-tolyl polymer constituting the highly shrinkable acryl-based fiber of the present invention may be composed of one kind of polymer or a mixture of two or more kinds of polymers having different acrylonitrile contents. However, it is preferably composed of a mixture of two or more polymers having different atarilonitrile contents.
• the acrylonitrile-based polymer is more specifically 92 to 99% by weight of acrylonitrile, and more specifically a monomer of 1 to 8 which is copolymerizable with acrylonitrile.
• Atari consisting of wt% Ronitoriru polymer and (A), acrylonitrile 8 0 wt 0/0 or 9 2 wt 0/0 Not ⁇ Pi Akurironitoriru copolymerizable with Biel monomer 8 wt%, greater 2 0 wt% acrylonitrile polymer consisting of ( Preferable is a mixture having a weight ratio (A / B) of 0.2 to 1.5 with respect to B).
• the polymer (A) exhibits the property of suppressing hair growth in the polishing process in the pile product manufacturing process, but if the acrylonitrile unit content is too small, there is no hair growth suppression effect, and the amount is too large. Although there is hair growth suppression, high shrinkage cannot be obtained.
• Bull monomers copolymerizable with AN are used to improve the solubility in solvents during spinning, to improve the stability of the spinning stock solution, and to improve the physical properties of the fiber. Gelling easily occurs and operation stability is reduced. If it exceeds 8% by weight, fiber properties and heat resistance are reduced.
• a sulfonate group-containing monomer when used as another monomer, it imparts coloring properties and gloss to the fiber.
• the fiber elongation may be reduced.
• the weight is 0.5 weight because the spinning properties are deteriorated and the fibers are liable to be adhered during the spinning process. It is preferable to use in the range of / 0 or less and to use another monomer in combination.
• the polymer (B) is for exhibiting a high shrinkage property. If the content of the attril-trityl unit is too small, the texture of the pile product is deteriorated. The meaning of using together with (A) is reduced, and it becomes difficult to obtain high shrinkage.
• Two or more polymers having different atarilonitrile unit contents (particularly preferably, the above-mentioned polymer (A) and polymer (B)) have a high shrinkage to dry heat by being present in a mixed state in acrylic fiber. It gives good appearance and soft texture when made into pile products. It is preferable that the mixed state is as uniform as possible. If there is a portion where each different polymer (for example, polymer (A) and polymer (B)) exists individually in a block such as side-by-side or sea-core, The appearance and texture of the final pile product are satisfactory due to the occurrence of shrinkage spots and hair growth.
• the mixing ratio is as follows:
• the weight ratio (A / B) is 0.2 to 1.5, preferably 0.5 to 1.0. If the mixing ratio (A / B) is too small, the shrinkage under dry heat will be satisfactory, but on the other hand, hair elongation tends to occur in the polishing process in the pile product manufacturing process, resulting in poor product appearance and texture.
• the mixing ratio is too large, high shrinkage due to dry heat cannot be obtained, and the appearance and texture of the pile product deteriorate.
• the acrylonitrile unit in the composition of each polymer is 50% by weight. % Or more, preferably 80% by weight. / 0 or more, and in accordance with the above two types of polymers, the content of acrylonitrile units in consideration of the balance between hair growth inhibition properties and high shrinkage properties, and other physical properties Etc. can be determined.
• the cross-sectional shape of the high shrink acrylic fiber of the present invention is not particularly limited, and may include a weathering stabilizer, an antibacterial agent, a pigment, a dye, an antistatic agent, a conductive agent, an antifouling agent, and the like.
• the highly shrinkable acrylic fiber of the invention can be produced by the following method.
• the Akuriro nitrile-based polymer containing acrylonitrile 5 0 wt 0/0 above is dissolved in a solvent to prepare a spinning solution.
• the Atari mouth-tolyl polymer one kind of polymer may be used, or a mixture of two or more kinds of polymers having different acryl mouth ethril contents may be used, but two kinds having different atarilonitrile contents may be used.
• mixtures of more polymers more specifically, Atariroetori Le unit 9 2-9 9 wt 0/0 ⁇ Pi Akuriro - tolyl copolymerizable with Bulle monomer units of 1 to 8 wt 0/0 Acrylonitrile-based polymer (A) consisting of: and arilonitrile units of 80 weight. / 0 or 9 2 wt 0/0 and less than ⁇ Tari Roni Torino les copolymerizable with vinyl It is preferable to use a mixture having a weight ratio (AZB) of 0.2 to 1.5 with the acrylotrile-based polymer (B) comprising more than 8% by weight and 20% by weight or less of the monomer unit.
• A Acrylonitrile-based polymer
• AZB weight ratio
• the prepared spinning dope is discharged from a spinneret nozzle into a coagulation bath composed of a solvent and water, and then the coagulated yarn is stretched 2 to 6 times in the bath to remove solvent, apply an oil agent, and dry and densify. Heat relaxation and dry heat drawing are performed. Finally, the number of crimps N (ke / inch) is 5 to 12 and the degree of crimp D (%) is 7 or more, and the product NXD value is 50 or more.
• the heat shrinkage of acryl fibers is greatly affected by the content of atarilonitrile, and the shrinkage tends to increase when the content of atarilonitrile is small.
• the difference in the shrinkage ratio due to the difference in the heat treatment temperature tends to be large. Since the working range is extremely narrow, it is preferable to control the spinning conditions and the like to an acrylonitrile content of 85% by weight or more.
• the stretching ratio is low, it is difficult to obtain the desired shrinkage ratio. If the stretching ratio is high, the shrinkage due to the difference in heat treatment temperature depends on the acrylonitrile content in the polymer. Since the difference in the draw ratio tends to increase and the shrinkage ratio decreases due to elongation or elongation, the draw ratio in the dry heat drawing is preferably in the range of 1.6 to 2.5.
• the solvent used in the production of the highly shrinkable acryl-based fiber of the present invention is not particularly limited, but organic solvents such as dimethylacetamide and dimethylsulfoxide are preferably used.
• the polymer concentration in the spinning solution is not particularly limited.
• the crimping is applied to the highly shrinkable acrylic fiber by using a stuffing box type tamper and appropriately controlling the nip pressure, clapper pressure (stuffing box) pressure, and the like to obtain the desired number of crimps N (Q / inch) and crimping degree D (%).
• the ⁇ -shrinkable acryl-based fiber of the present invention is used as a component of a pile material of various raised fabrics.
• a pile portion such as a bore and a high pile cloth is suitably used as a hair-growing component in a two-layered napping fabric of hair-growth and stabbing.
• a pile material containing a high shrinkage hair growth component is required.
• the pile composition must contain the highly shrinkable acryl-based fiber of the present invention in the range of 20 to 90% by weight.
• the content of the highly shrinkable acryl-based fiber of the present invention in the pile composition is too small, the effect as hair growth constituting the pile cannot be exerted and the bulkiness of the pile is lacking.
• the texture becomes coarse and hard. Therefore, the range of 20% by weight to 90% by weight is particularly preferable.
• the pile composition is composed of the high-shrinkable acryl-based fiber of the present invention and the low-shrinkage fiber as a bristle component, and contains 80 to 10% by weight of the low-shrinkage fiber.
• the low shrinkage fiber constituting the pile composition together with the high shrinkage acrylic fiber of the present invention the shrinkage ratio after treatment under dry heat at 130 ° C. for 10 minutes under no load is the high shrinkage ratio of the present invention.
• the fiber material is not particularly limited as long as the fiber has a difference of at least 10% from the acryl-based fiber, such as acrylic fiber, polyamide fiber, polyester fiber, polyvinyl chloride fiber, polypropylene fiber, polyethylene fiber, etc. Examples include synthetic fibers, semi-synthetic fibers such as rayon and acetate, and natural fibers such as cotton and wool. These fibers may be used alone or in combination of two or more.
• the low-shrinkable fiber when an acrylic fiber is used as the low-shrinkable fiber together with the high-shrinkable acrylic fiber of the present invention as a component of the pile composition, the low-shrinkable fiber is dried at 130 ° C under dry heat without load. It is preferable to use a low-shrinkage acryl-based fiber having a shrinkage rate of 5% or less after a minute treatment, and a pile composition containing 80 to 10% by weight of the low-shrinkage acryl-based fiber is preferred. If this is the case, a soft and bulky napped fabric can be obtained by more effectively exhibiting the characteristics of acryl-based fibers having excellent coloring properties. This pile composition is used in a state where raw cotton of each fiber is mixed and further slivered.
• the low-shrinkage acrylic fiber preferably used is a fiber having a modified cross section
• various textures can be imparted to the napped fabric.
• a flat cross-section fiber is used to give a soft feeling of animal hair to a nap-up fabric
• a dockbone (dumbbell) or horseshoe cross-section fiber is used to give a slimy feeling.
• use Y-shaped cross-section fibers or cross-section fibers to give a more voluminous feel, and a depth exceeding 0.3 m in the major axis direction in the fiber cross section to give a glossy appearance.
• a flat cross-section fiber having a smooth surface with a length of 25 ⁇ or more without a concave portion is used.
• a raised fabric using such a pile composition can be produced by a conventionally known method and apparatus, but the hair-growing component in the pile composition is subjected to a treatment with a tenter in the process of producing the piled fabric.
• the high-shrinkable acryl-based fibers are shrunk into hair-grown hairs.
• the crimps are removed and stretched to form stabs, giving a soft and bulky good texture and beautiful appearance.
• Dry heat shrinkage (%) [(L. 1 / L.) X I 00
• the fiber was chopped into chips to prepare a sample, which was calculated by performing DSC measurement under the following conditions.
• a homopolymer or a polymer mixture having the composition shown in Table 1 was dissolved in dimethylacetamide, and a coloring agent was added to prepare a spinning dope having a polymer concentration of 25% by weight.
• the undiluted spinning solution is extruded through a spinning nozzle into a coagulation bath of a 50% by weight aqueous solution of dimethylacetamide at a bath temperature of 40 ° C., and the coagulated yarn is drawn into a bath at a draw ratio shown in Table 1 in a draw washing tank. Stretched.
• a fibrous oil containing at least 60% by weight of a cationic surfactant is applied as a leveling agent, and after drying and densification, the results are shown in Table 1 by relaxing in pressurized steam and using a dry heat roller at 120 ° C. Dry heat drawing was performed at a draw ratio, and further mechanical crimping was applied to obtain a fiber having a single fiber fineness of 4 dtex.
• Polymer composition weight ratio
• Stretch ratio times
• the obtained highly shrinkable acryl-based fiber of the present invention is cut into a length of 32 mm, and a 40% by weight of this short fiber and a low-shrinkable acrylic fiber are manufactured by Mitsubishi Rayon Co., Ltd. Shrinkage rate of less than 3% at 10 ° C for 10 minutes, monofilament fineness of 11 dtex, cut length of 51 mm acrylic short fiber) 60% by weight is mixed to make pile cotton, and sliver is made from the cotton. Then, a sliver knit is made with a sliver etching machine together with a polyester filament yarn of the ground yarn 1 50 dtex / 48 f to be the base fabric, resin-processed on the back side, and dried with a tenter at 130 ° C.
• Polishing and sealing were performed in an atmosphere of dry heat 170-90 ° C to obtain a pile cloth having a pile height of 18 mm.
• the resulting pile cloth was evaluated for appearance and texture, and the results are shown in Table 4.
• the pile cloth obtained in Examples 1 to 4 was a high pile cloth having a clear two-layer structure with a height difference of 5 mm between the hair growth and the stabbing.
• a pile cloth having a pile height of 18 mm was obtained in the same manner as in Example 1 except that a sliver was prepared from the raw cotton.
• the pile cloth obtained in each of Examples 5 and 6 was a high pile cloth having a clear two-layer structure with a height difference of 5 mm between the hair growth and the sting.
• Polymer A and polymer B having the composition shown in Table 6 were mixed and dissolved in dimethylacetamide at the weight ratio shown in Table 6 to prepare a spinning stock solution having a polymer concentration of 25%.
• Spinning is performed by a wet spinning method in which a 50% aqueous solution of cetamide is discharged into a coagulation bath, dried and densified, relaxed in pressurized steam at 135 ° C, and dried at 130 ° C. Dry heat drawing was performed at a draw ratio of 1.8 times using a dry heat roller, followed by mechanical crimping to obtain a fiber having a single fiber fineness of 4 dtex.
• AN acrylonitrile
• AV vinyl acetate
• Table 7 shows the dry heat shrinkage, the maximum value of the heat shrinkage stress, and the maximum value of the heat shrinkage stress of the obtained acrylic fiber. Further, the obtained acrylic fiber of the present invention was pressed to a length of 32 mm, and 40% by weight of this short fiber was mixed with Mitsubishi Rayon's funkle (dry heat shrinkage at 130 ° C 3%, single fiber fineness lldtex , Atrial short fibers with a cut length of 51 mm) Blend 60% by weight to produce raw cotton for piles, make sliver knits from the raw cotton with a sliver knitting machine, and perform backing curing at 130 ° C.
• Mitsubishi Rayon's funkle dry heat shrinkage at 130 ° C 3%, single fiber fineness lldtex , Atrial short fibers with a cut length of 51 mm
• a high-pile product having a two-layered pile with stabbed hair without shrinkage of the heat-shrinkable acryl fibers by polisher treatment at ° C was obtained without shrinkage of the heat-shrinkable acryl fiber.
• the appearance and texture of the obtained high pile product were evaluated, and the results were obtained.
• Example 910 The acryl fiber of the present invention obtained in Example 7 was blended with a short fiber having a length of 32 mm and a funnel manufactured by Mitsubishi Rayon Co., Ltd. at a weight ratio shown in Table 9 to produce a raw cotton for pile.
• a sliver knit was made from the raw cotton by a sliver-using machine, and a high pile product was obtained in the same manner as in Example 1. The appearance and texture of the pile product were evaluated, and the results are shown in Table 9.
• the highly shrinkable acrylic fiber of the present invention is a pile material that has excellent shrinkage against dry heat and gives soft, good texture and a beautiful appearance to nap fabrics such as pores, high pile fabrics and mats. Yes, it is particularly suitable for pile compositions combined with non-high shrink fibers. Further, the napped fabric using the pile composition containing the highly shrinkable acrylic fiber of the present invention has a soft and good texture and an excellent appearance.

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• Engineering & Computer Science (AREA)
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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Woven Fabrics (AREA)
• Knitting Of Fabric (AREA)
• Artificial Filaments (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

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• 2002
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